what is compressor surge

[daltondaytona]

i know that bov's prevent it but what does it actually mean???

[Marcus86GLHS]

surge generally refers to a condition where airflow moves backwards in the compressor, whether in an axial flow compressor (blade tip stalling) or a centrifugal compressor (ie: turbocharger).

airflow moving in two directions during surging "crashes" inside the compressor and can stall the compressor, cause mechanical damage, or in a small surge disrupt the operation/speed of the compressor momentarily (this is what we typically experience in a boosted car w/o a bov).

a bov releases an over-pressure situation between the compressor outlet and the throttle blade that would otherwise slow, stall, or damage the compressor.

[TurboTurismo]

Good post , That being said, now raise the boost up w/o a bov and see how long the turbo will last

Robb



The "MO": 84 Plymouth Turismo..::2.5 CB MPI INTERCOOLED TURBO/ Updated Aug 30/07 - London, Ontario

[GLHNSLHT2]

or simply when the turbo is trying to push more air than the motor can use.

[mopar2ya]

Take a box fan and stick a box over the outlet side (simulates TB closing) and the fan slows down, this is a very basic and non-violent way to see what happens.

Then you can stick it on the sucktion side and restrict it there and that will show you what too small of a air filter will do.